William



(No Model.)

W. 0. HUMAN.

GAS GOGK.

No. 398,616. Patented Feb. 26, 1889.

UNITED STATES PATENT OF ICE,

\YILTJAM HUMAN, OF MERIDEN, CONNEUTICL", \SSIGNOR TO ElHVARl) MILLER d: COMPAXY, OF SAME PLACE.

GAS-COOK.

SPECIFICATION forming part of Letters Patent No. 398,616, dated February 26, 1889.

Application filed November 5, 1888. Berial No. 239,959. (No model.)

To ail whom it may concern:

Be it. known that I, \VILLIAM U. HUMAN, of Meriden, in the county of New Haven and State of Connecticut, have invented a new Im- 5 provement in Gas-Cocks; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and

which said drawings constitute part of this specification, and represent, in-

Figure 1, a front view of the cock complete;

Fig. 2, a side view of the same; Fig. 3, an inlet end view; Fig. 4, a vertical central section cutting through the projection and showing the plug in side view; Fig. 5, a vertical central section. of the shell with the plug and sleeve removed; Fig. 6, a modification.

This invention relates to an improvement in that class of cocks for gas-burners which are designed to permit a slight escape of gas, so as to support a very small flame, but which are adapted to be turned so as to admit a full supply of gas, or to cut o'lt the full supply down to the very slight flame without thei possibility of entirelyextinguishing the flame, j, and so that the full supply may be instantly admitted or cut off with a certainty that the i flame will not be extinguished in the act of cutting off; and it consists in the construction, as hereiiiialter described, and more particularly recited in the claims.

A represents the body or shell of the cock, which is constructed at one end with a male or female screw corresponding to the tip to which the cock is to be applied. (Here represented as a female screw, ll.) The other end is also provided with a screw, to which the burner maybe applied. ll ere represented as a male screw, (7.)

From one side of ihe shell a tubular projection, D, is formed cylindrical upon its outer surface, as seen in Fig. 5. In the shell is a chamber, E, in line with and which opens into the interior of the projection 1); but this chamber E is of smaller area than the transi verse area of the intcriorot' theprojection D,

and so as to form a seat, a, between the cham ber E and the interior of the projection D.

From the inlet end of the shell a passage, 12,

opens to the chamber E, and from the inie rior ot' the projection D a passage, (1, leads to the exit of the shell. Into the tubular projection D a cylindrical plug, F, is closely fitted, but so as to be easily rotated therein. The end of this plug normally rests against the seat a, between the interior of the projection l) and the chamber E, and so as to cut off communication between the chamber E and the outlet of the shell, except as to a slight escapcqmssage, c, from the chamber E directly into the outletpassage f. This escape-passage e is what is commonly called a thief. hen the plug F rests against the seat (.1, all connnunication between the inlet-passage and the outlet-passage is cut off, except as to the thief c; but if the plug be withdrawn from its seat then passage is opened from the inlet to the outlet for a lull escape. To thus withdraw the plug F and open the passage, a sleeve, G, is fitted to the exterior cylindrical surface of the projection D. This sleeve is of cup shape, closed at its outer end, and to this closed end the plug is secured, as seen in Fig. l. The projec- 7 tion, the sleeve, and the plug, all being concentric, permit the roi'ai ion of the sleeve and plug around and in the projection D. The plug, however, his so closely within the pro jcci'ion l) as to prevent the escape of gas around the plug. This sleeve (r is constructed with a cam-shaped slot, g, (see Figs. and. 23,) and on the exterior surface of the sleeve (5? is a radially-projccting stud, l1, corresponding to the slot 9. If the sleeve G be rotated in one direction, the slot. g operates upon the stationary stud 71 as a cam, and withdraws the sleeve from the projection, and with it the plug F, as represented in broken lines, Fig. 4, and so as to open full communicaiiion for the escape of gas to the burner. Turned in the opposite direction, the slot 9 operates upon the stud 71 to force the plug to its seat a, and so as to cut off the escape of gas, except as to the thief, as before described.

As a convenient means [or rotating the sleeve (:ir, it is provided with two radially-projecting arms, H Land for convenience chains or cords are attached thereto, as seen in Fig. I00

1, so that a pull upon one arm will turn the sleeve in one direction and withdraw the plug, or the pull upon the other arm will turn the sleeve in the opposite direction and force the plug to its seat.

For convenience of applying the sleeve G to the projection D, the slot 9 is constructed with a -longitudinal opening, 2 to the inner edge of the sleeve, so that when the sleeve is set onto the projection, and the openingt'is in line with the stud, it will pass on to its proper position and bring the stud it into line with the cam-shaped portion of the slot.

It will be understood that ordinarily the usual gas-cock is employed, my improved cock being arranged directly at the burner andbetween the burner and 'the usual full cut-oft cock, and so that my improved cock may be employed as a regulator for the burner as Well as to cut off the supply down to the thief, or admit the full supply by simply turning the sleeve as occasion may require, and this turning maybe made without danger of extinguishing the flame or of admitting too great a supply, the sleeve being stopped in its rotation when the full supply is on, and also stopped when out down to the thief by coming to its seat a.

The arms H I, pro jeeting from the sleeve, may be omitted from the sleeve and the sleeve turned directly by hand; but the arms are aconvenience for rotating the sleeve.

\Vhile I prefer to impart the rotative and longitudinal movement to the plug F by means of the surrounding sleeve, both for convenience and because the sleeve aids in packing the joint around the plug, the sleeve may be omitted, and the spiral or cam-shaped slot g formeddirectly in the plug, as seen in Fig. 6, and the stud 71 extended .into the said slot g, so that the same longitudinal movement will be imparted to the plug as that which I have described as produced by the sleeve G. I

chamber E, the said shell constructed With a right-angular cylindrical projection, D, the interior of which is in line with and opens into the said chamber E, but the transverse area of the interior of the projection greater than the transverse area of the chamber E, and so as to form a seat, a, between the said chamber and interior of the projection, the interior of the said projection also opening into the outlet-passage of the cook, the said seat constructed with a slight escape, 6, into the outlet-passage, combined with a cylindrical plug, F, adapted to rotate in said projection and to come to a bearing against the said seat a, and the said plug provided with a spiral or cam-shaped slot, and the said projection with a corresponding stud adapted to work in said cam-shaped slot, substantially as described, and whereby under rotation of the said plug the said eam-shapedslotoperating in connec tion with said stud Will impartto the said plug a longitudinal movement from or to its seat, ac; cording tothe direction in which the plug: is rotated.

2. The herein-described gas-cock, consisting of a shell having an inlet at one end and outlet at the opposite end, with an intermediate chamber, E, into which the outlet opens, the shell constructed-With a cylindrical tubular projection, D, the interior of said projection being in line with but of greater transverse area than the transverse area of the chamber E, and so as to form aseat, a, between the said chamber E and the interior of the proj ection D, the interior of the saidprojection opening in to the outlet-pas'sage'from the cock, combined With a rotative plug, F, in said chamber,constructed with or formed as apart of a sleeve, G, concentric with and surrounding said cylindrical projection D the sleeve constructed with a cam-shaped slot, g, and the projection providedwith a corresponding stud, h, the seat between the chamber E and the interior ofthe projection D constructed with a slight escape, e into the outlet passage of the cock, substantially as and for the phr pose described.

WM. 0. rioMAn.

\Vitnesses:

A. W. HARVEY, C. E. HOMAN. 

